NDLI: Optical Channel Monitoring Using Two Photon Absorption

Content Provider	IEEE Xplore Digital Library
Author	O'Dowd, J. Kilper, D.C. Guo, W.H. Donegan, J.F. Chandrasekhar, S.
Copyright Year	2007
Description	Author affiliation: Trinity Coll. Dublin, Dublin (O'Dowd, J.)
Abstract	Optical channel monitoring is used for managing and conditioning dense wavelength division multiplexed (DWDM) signals in optically transparent transmission systems. In addition to measuring channel power and wavelength, more detailed channel identification information is desirable such as modulation format and bit rate. This application is particularly challenging in optically transparent mesh transport systems because the transparent nature of the network lends itself to the use of diverse modulation formats and bit rates. Furthermore, the loss of signals propagating over long distances can result in spectral noise peaks that can be equal in power to DWDM signals. In order for nodes to independently recover from these conditions, the resident channel-monitoring device must be able to distinguish such noise peaks from signal bearing channels. Two photon absorption monitoring has received attention recently as a simple and robust measurement that is sensitive to group velocity dispersion, polarization mode dispersion, and the optical signal to noise ratio (OSNR). In this paper, the use of two-photon absorption in a channel-monitoring configuration is studied. Given that two-photon absorption, which is proportional to an average over the intensity squared, is a measure of the signal variance, the authors demonstrate that the two-photon absorption normalized to the square of the single photon absorption provides an indication of channel presence and also explore the conditions under which the channel modulation format can be distinguished.
Starting Page	1
Ending Page	1
File Size	79355
Page Count	1
File Format	PDF
ISBN	9781424409303
DOI	10.1109/CLEOE-IQEC.2007.4386445
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-17
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Condition monitoring Absorption Power system management Bit rate Wavelength division multiplexing Optical sensors Optical noise Optical modulation Polarization mode dispersion Signal to noise ratio
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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